Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Portal system

Portal system

US Patent 4832563 · Granted May 23, 1989

Assignee

Fibro Gmbh

Inventors

Hans-Joachim Massmann (3 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Loading and unloading apparatus, in particular for loading and unloading presses1999

Portal system1991

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly